Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Add verifier_size #4

Merged
merged 1 commit into from
Nov 1, 2020
Merged

Add verifier_size #4

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
15 changes: 14 additions & 1 deletion src/snark/constraints.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -14,7 +14,7 @@ use ark_relations::{
},
};
use ark_snark::{CircuitSpecificSetupSNARK, UniversalSetupSNARK, SNARK};
use ark_std::{borrow::Borrow, marker::PhantomData, vec::Vec};
use ark_std::{borrow::Borrow, fmt, marker::PhantomData, vec::Vec};

/// This implements constraints for SNARK verifiers.
pub trait SNARKGadget<F: PrimeField, ConstraintF: PrimeField, S: SNARK<F>> {
Expand All @@ -25,6 +25,19 @@ pub trait SNARKGadget<F: PrimeField, ConstraintF: PrimeField, S: SNARK<F>> {
type InputVar: AllocVar<Vec<F>, ConstraintF> + FromFieldElementsGadget<F, ConstraintF> + Clone;
type ProofVar: AllocVar<S::Proof, ConstraintF> + Clone;

/// Information about the R1CS constraints required to check proofs relative
/// a given verification key. In the context of a LPCP-based pairing-based SNARK
/// like that of [[Groth16]](https://eprint.iacr.org/2016/260),
/// this is independent of the R1CS matrices,
/// whereas for more "complex" SNARKs like [[Marlin]](https://eprint.iacr.org/2019/1047),
/// this can encode information about the highest degree of polynomials
/// required to verify proofs.
type VerifierSize: PartialOrd + Clone + fmt::Debug;

/// Returns information about the R1CS constraints required to check proofs relative
/// to the verification key `circuit_vk`.
fn verifier_size(circuit_vk: &S::VerifyingKey) -> Self::VerifierSize;

/// Optionally allocates `S::Proof` in `cs` without performing
/// additional checks, such as subgroup membership checks. Use this *only*
/// if you know it is safe to do so. Such "safe" scenarios can include
Expand Down